class Sequel::TimestampMigrator

  1. lib/sequel/extensions/migration.rb
Superclass: Migrator

The migrator used if any migration file version is greater than 20000101. Stores filenames of migration files, and can figure out which migrations have not been applied and apply them, even if earlier migrations are added after later migrations. If you plan to do that, the responsibility is on you to make sure the migrations don't conflict. Part of the migration extension.


Public Class

  1. new

Public Instance

  1. applied_migrations
  2. is_current?
  3. migration_tuples
  4. run


Error = Migrator::Error  


applied_migrations [R]

Array of strings of applied migration filenames

migration_tuples [R]

Get tuples of migrations, filenames, and actions for each migration

Public Class methods

new(db, directory, opts=OPTS)

Set up all state for the migrator instance

[show source]
    # File lib/sequel/extensions/migration.rb
673 def initialize(db, directory, opts=OPTS)
674   super
675   @target = opts[:target]
676   @applied_migrations = get_applied_migrations
677   @migration_tuples = get_migration_tuples
678 end

Public Instance methods


The timestamp migrator is current if there are no migrations to apply in either direction.

[show source]
    # File lib/sequel/extensions/migration.rb
682 def is_current?
683   migration_tuples.empty?
684 end

Apply all migration tuples on the database

[show source]
    # File lib/sequel/extensions/migration.rb
687 def run
688   migration_tuples.each do |m, f, direction|
689     t =
690     db.log_info("Begin applying migration #{f}, direction: #{direction}")
691     checked_transaction(m) do
692       m.apply(db, direction)
693       fi = f.downcase
694       direction == :up ? ds.insert(column=>fi) : ds.where(column=>fi).delete
695     end
696     db.log_info("Finished applying migration #{f}, direction: #{direction}, took #{sprintf('%0.6f', - t)} seconds")
697   end
698   nil
699 end